基于对象属性值的 JS 对象转换

Question

我看过很多其他与js对象排序相关的问题，其中大部分倾向于建议使用.map方法根据a的值对对象或对象数组进行排序属性，但我正在尝试实现一些稍微不同的东西。

我正在尝试转换此对象格式：

{
    "commits": [
        {
            "repository": "example-repo-1",
            "commit_hash": "example-hash-1"
        },
        {
            "repository": "example-repo-1",
            "commit_hash": "example-hash-1.2"
        },
        {
            "repository": "example-repo-2",
            "commit_hash": "example-hash-2"
        }
    ]
}

进入一个使用 'repository' 值格式化的对象，如下所示：

{
    "example-repo-1": [
        {
            "repository": "example-repo-1",
            "commit_hash": "example-hash-1"
        },
        {
            "repository": "example-repo-1",
            "commit_hash": "example-hash-1.2"
        }
    ],
    "example-repo-2": [    
        {
            "repository": "example-repo-2",
            "commit_hash": "example-hash-2"
        }
    ]
}

所以我需要将我的原始对象（一个包含其他对象数组的对象）转换为 return 一个包含大量数组的对象，以存储库的值命名属性并包含与属性值匹配的每个对象。

Answer 1

使用Array#forEach方法

var data = {
  "commits": [{
    "repository": "example-repo-1",
    "commit_hash": "example-hash-1"
  }, {
    "repository": "example-repo-1",
    "commit_hash": "example-hash-1.2"
  }, {
    "repository": "example-repo-2",
    "commit_hash": "example-hash-2"
  }]
};

var res = {};

data.commits.forEach(function(v) {
  // define the pproperty if already not defined
  res[v.repository] = res[v.repository] || [];
  // push the reference to the object or recreate depense on your need
  res[v.repository].push(v);
})

console.log(res);

或使用Array#reduce方法

var data = {
  "commits": [{
    "repository": "example-repo-1",
    "commit_hash": "example-hash-1"
  }, {
    "repository": "example-repo-1",
    "commit_hash": "example-hash-1.2"
  }, {
    "repository": "example-repo-2",
    "commit_hash": "example-hash-2"
  }]
};

var res = data.commits.reduce(function(obj, v) {
  // define property if not defined
  obj[v.repository] = obj[v.repository] || [];
  // push the object
  obj[v.repository].push(v);
  // return the result object
  return obj;
}, {})

console.log(res);

Answer 2

尝试这样的事情

var input = {
    "commits": [
        {
            "repository": "example-repo-1",
            "commit_hash": "example-hash-1"
        },
        {
            "repository": "example-repo-1",
            "commit_hash": "example-hash-1.2"
        },
        {
            "repository": "example-repo-2",
            "commit_hash": "example-hash-2"
        }
    ]
};

var output = {};

input.commits.forEach(function(el){
  if(!output[el.repository])
    output[el.repository] = [];
   output[el.repository].push[el];
  })
console.log(output);

基于对象属性值的 JS 对象转换

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